Cleanup: make ExtensionRequestSender manage its IPC responses directly, rather

chrome/common/extensions/extension_messages.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // IPC messages for extensions.
 // Multiply-included message file, hence no include guard.
 
 #include "base/shared_memory.h"
 #include "base/values.h"
 #include "chrome/common/extensions/extension.h"
@@ skipping 158 matching lines @@
 
 }  // namespace IPC
 
 #endif  // CHROME_COMMON_EXTENSIONS_EXTENSION_MESSAGES_H_
 
 // Messages sent from the browser to the renderer.
 
 // The browser sends this message in response to all extension api calls. The
 // response data (if any) is one of the base::Value subclasses, wrapped as the
 // first element in a ListValue.
-IPC_MESSAGE_ROUTED4(ExtensionMsg_Response,
-                    int /* request_id */,
-                    bool /* success */,
-                    ListValue /* response wrapper (see comment above) */,
-                    std::string /* error */)
+IPC_MESSAGE_CONTROL4(ExtensionMsg_Response,
+                     int /* request_id */,
+                     bool /* success */,
+                     ListValue /* response wrapper (see comment above) */,
+                     std::string /* error */)
 
 // This message is optionally routed.  If used as a control message, it
 // will call a javascript function in every registered context in the
 // target process.  If routed, it will be restricted to the contexts that
 // are part of the target RenderView.
 // If |extension_id| is non-empty, the function will be invoked only in
 // contexts owned by the extension. |args| is a list of primitive Value types
 // that are passed to the function.
 IPC_MESSAGE_ROUTED5(ExtensionMsg_MessageInvoke,
                     std::string /* extension_id */,
@@ skipping 296 matching lines @@
 // alive.
 IPC_MESSAGE_ROUTED0(ExtensionHostMsg_DecrementLazyKeepaliveCount)
 
 // Fetches a globally unique ID (for the lifetime of the browser) from the
 // browser process.
 IPC_SYNC_MESSAGE_CONTROL0_1(ExtensionHostMsg_GenerateUniqueID,
                             int /* unique_id */)
 
 // Resumes resource requests for a newly created app window.
 IPC_MESSAGE_CONTROL1(ExtensionHostMsg_ResumeRequests, int /* route_id */)